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# 来源(Source)：

#include<bits/stdc++.h>
#define ios ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define debug  freopen("in.txt","r",stdin),freopen("out.txt","w",stdout);
#define fs first
#define sc second
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int maxn = 1e6+10;
using namespace std;
 
int T,a,b,c;
void solve(){
	vector<char> ans;
	if(a || b) for(int i = 1;i<=a+1;i++) ans.push_back('0');
	if(c) for(int i = 1;i<=c+1;i++) ans.push_back('1');
	if((a&&c) || (b&&c)) b -= 1;
	for(int i = 1;i<=b;i++) {
		if(c) ans.push_back(((i%2==1)? '0':'1'));
		else ans.push_back(((i%2==1)? '1':'0'));
	}
	for(auto c: ans) cout<<c;cout<<'\n';
}
 
int main(){
	// debug;
	ios;
 
	cin>>T;
	while(T--){	
		cin>>a>>b>>c;
		solve();
	}
	return 0;
}
